Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1abb4d2e94064d…

MALICIOUS

PDF

45.6 KB Created: 2020-09-10 12:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b6c9bcd16c6852b6f35be911c2d7ee9 SHA-1: d7d69bd604669c10cf81967da11e796a0b7df4a3 SHA-256: 2c1abb4d2e94064d172d0e5f4cddf8cb4f43eb7dca3a050fd75a6bced1b7af2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=android+arraylist+add+string+array, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=android+arraylist+add+string+array In PDF document text
    • http://files.shelleypearsonwrites.com/uploads/1/3/0/7/130775786/kokizererurerom-wanemakedilex-nozorenon.pdfIn PDF document text
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdfIn PDF document text
    • http://midedaros.smashstudiosfitness.com/uploads/1/3/0/7/130739678/8e8d768.pdfIn PDF document text
    • http://defigumom.shadowwolf-studios.com/uploads/1/3/1/4/131437294/7319618.pdfIn PDF document text
    • http://judod.thinktify.com/uploads/1/3/0/8/130874493/wosidotopi-wugezonibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ea9bdf_23ecb2ba3d5c4680862e653473843d3d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de02f3_8a575714bd394a738b23033f0dd15257.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/221f3a_ead48925f56242bb8e9e6407dfac8c68.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1c05f_52044c3756e6431b8d3f1751b06138b8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/800b88_3f57ccaa560e44849d1c5109040de6f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/724bd4_ef082de0679347dd8e15b0aed224be89.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1d005_e5ddb13a10eb45fda53cf841218c149d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6522/1023/files/leibel_and_phillips_textbook_of_radiation_oncology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/43349765724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/84912659555.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 5084 bytes
SHA-256: eea882856f0cccf595aed6fe36193324ee4c34f84d60e53b065266af0f9b52b0
font_01_sfnt_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 15332 bytes
SHA-256: 8592f9c4287f5f78ab69cda50ba450c9f685dee3f09fc19623d4b758d0aa1d74

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